Warp stop motion



Au g. 17 1926.

J. S. BELLOWS WARP STOP MOTION Filed Jan 1925 2 Sheets-Sheet Aug. 17, 1926.

J. s. BELLOWS WARP STOP MOTION Filed Jan. 1925 2 Sheets-Sheet Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

JOHN S. BELLOWS, OF WOONSOCKET, RHODE ISLAND, ASSIGN OR TO CROMPTON & KNOWLES. LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

Application filed January This invention relates to improvements in warp stop motions and more particularly to multi-bank motions employing-several sets or banks of detectors or drop wires.

, In the type of warp stop motion shown in Patent No. 1,265,112 issued to Regan May 7, 1918, there is employed a flattened rod or vibrator which normally oscillates in slots punched in the detectors or drop wires. When a thread becomes slack or broken the corresponding detector drops and a narrow portion of the slot restrains oscillation of the rod to set in motion mechanism tostop the loom. The vibrators are usually actuated by means of the motion shown in Patent No. 1,360,638 issued to Holmes Nov. 30,1920, which shows a single spring for actuating all of the vibrators. Where several vibrators are employed, such as in four and six bank motions, it is necessary to have this spring relatively strong, and a fallen detector or drop wire is called upon to resist the pressure of this relatively strong spring and is likely to twist or bend in such a way as to prevent a proper indication.

It is the general object of my present invention to provide improved means for oscillating a plurality of vibrators wherein each vibrator will .have its own driving device which will be independent of the driving devices for the other vibrators.

It is a further object of my invention to provide a plurality of vibrators each adjustable and arrestable independently of the other vibrators so as to provide a sensitive detecting movement.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown one form of my invention,

Fig. 1 is a side elevation of my invention showing the same at the beginning of a working stroke,

Fig. 2 is a top plan view looking in the direction of arrow 2 in Fig. 1,

Fig. 3 is a rear elevation looking in the direction of arrow 3, Fig. 1,

Fi 4 is a section on line 4-4 of Fig. 1

showing in detail the knock-off mechanism,

Fig. 5 is a detail plan view of one of the controllers, and

30, 1925. Serial No. 5,853.

Fig. 6 is a detail view showing one of the levers by means of which the vibrators are driven.

' Referring more particularly to Figs. 1, 2 and 3 it will be seen that I have provided a loom side 10 of any approved construction to which is bolted a stand 11 having an upright bearing arm 12. The arm 12 is provided with a plurality of bearings 13 which receive the hubs 14 of levers 15, 16, 17, and 18, respectively. Referring to Fig. 2 it will be seen that the hubs are of varying lengths and are each provided with sockets 19 into which are fitted rods 20 held therein by screws 21, the rods 20 and sockets 19 constituting levers by means of which hubs 14 may be rocked in their bearings.

The stand 11 is provided with a guide arm 22 across the top of which is secured a cap 23 provided with a plurality of grooves 24 which are in vertical alignment with holes 25 drilled thereunder in the arm 22. Stand 11 is further provided with an offset 26 having secured therein stud 27 on which is journaled a lever 28 having a relatively long horizontal arm 29 formed with a knife edge 30 and having pivotal connection with the upper end of a rod 31 which receives reciproeating-motion from any conveniently located cam or other device (not shown) to impart rocking movement. Extending upwardly from the lever 28 is a broadened arm 32 constituting an actuator which provided with a plurality of spaced aligned openings 33 which are in alignment with the grooves 24 formed in the cap 23. Said openings. are indicated in dotted lines in Fig. 2 and one of them is shown in section in Fig. 5.

Extending through the openings 33, grooves 24 and holes 25 is a plurality of controllers indicated at 34, 35, 36, and 37 respectively. Each controller is formed of a wire which has bent therein an eye 38 as indicated in Fig. 5, the eyes being spaced to receive the rods 20 as shown in Fig. 2. Each controller is further provided with acollar 39 adjustably secured thereon intermediate the arms 22 and 32 and carries also a second collar 40 adjustably, secured on the end thereof outside the arm 32. Springs 41 are located on the controllers and lie between the arm 32 and collars 39 and impart a yield ing motion to the controllers when the actu= ator arm 32 is moved toward the rods 20.

Knock-off plunger 42 connected to the loom stopping devices (not shown), is guided in bearings 43 and 44 and is operated in such a way that downward motion of the plunger stops the loom. An adjustable collar 4-5 on the plunger receives the upward thrust of spring 46 the lower end of which presses against guide 44 and serves to hold the plunger in raised position.

stud 47 on the knock-off plunger has pivotally mounted thereon a series of weighted hooks 48 which tend to swing out of the path of the knife 30 but which are held normally in the path of said knife, being moved there positively by means of the bent ends 49 of the controllers 41. The latter are moved to the left as shown in Fig. 1 by the action of actuator arm 32 on collars 40.

The hubs 14 are provided with slots 51 which receive non-circular vibrators 50. Each vibrator 50 passes through its bank of detectors 52 and oscillates with its hub 14. The detectors are provided with a slot the upper end of which is reduced as at 53 to arrest oscillation of the vibrators.

In the normal operation of the device the rod 31 reciprocates and moves the actuator arm 32 which, through the action of springs 41, moves the controllers to the right from the position shown in Fig. 1.

The rods or levers 20 extend through the eyes 38 and will normally oscillate as the actuated arm 32 moves inwardly to give a rocking motion to the vibrators 50. The controllers will continue to reciprocate so long as the vibrators 50 are unresisted, and ends 49 of the controllers will permit the hooks 48 to assume the dotted line position shown in Fig. 1. As the rod 31 continues to descend knife 30 will move beyond the hooks and the knockoff plunger 42 will. remain in raised position. -f one of the detectors 52, however, should be in lower position so that the narrow part 50 of the slot thereof prevents oscillation of the corresponding vibrator, the controller therefor will be held against longitudinal motion and the actuator arm 32 will compress the spring 41 associated therewith. The corresponding hook 48 will accordingly be held in the position shown in Fig. 1 and as the knife 30 descends it will engage the hook in the path thereof and knock-0E plunger 42 will be lowered against the action of spring 46 and have an operative movement to stop the loom.

From the foregoing it will be seen that I have provided a warp stop motion having a plurality of vibrators to cooperate with a plurality of banks of detectors and have provided for adjusting the driving force. of each vibrator independently of the other vibrators. By varying the position of the collars 89 the driving force of the springs 41 may be adjusted as desired. It will also be seen that levers 20 in passing through the eyes 88 act to position the hubs 14 longitudinally.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein dis closed, but what I claim is:

1. In a warp stop motion, a plurality of vibrators, individual driving mechanism for each vibrator, actuating means common to all the driving means, yielding connections between the actuating means and the driving means, knock-off mechanism, and means to operate the knock-off mechanism when any of said vibrators is prevented from oscillating.

2. In a warp stop motion for looms, a plurality of oscillating vibrators, a driving lever for each vibrator, a controller for each lever, yielding driving means for each controller, an actuator common to all of the yielding driving means and receiving a regular operating movement, and knock-ofi' mechanism having an operative movement when any of said vibrators is prevented from oscillating.

3. In a warp stop motion for looms, a regularly moving actuator, a plurality of controllers, a resilient drive foreach controller deriving motion from said actuator, a plurality of vibrators, one for each controller, each vibrator having a detecting movement when unresisted, and knock-oif mechanism having an operative movement when any of the vibrators is arrested in its vibration, the other vibrators being free to continue their detecting movement inde pendently of the vibrator which is arrested 4. In a warp stop motion for looms, a regularly moving actuator, a plurality of vi brat'ors, a controller for each vibrator, individual yielding driving connections between each controller and the actuator, said actuator being effective on the detecting stroke to oscillate all of the vibrators, and knock-off mechanism having an operative movement when any vibrator is arrested in its oscillation, the unresisted vibrators continuing their detecting stroke after the arrested vibrator has stopped moving.

5. In a warp stop motion for looms, a plurality of vibrators, a controller operatively connected with each vibrator, individual yielding connections between each controller and the actuator mechanism to give the controllers a normal working stroke, a knock-off lever moving regularly with the actuator, a plurality of members normally in the path of the knock-off member and movable therefrom as the com trollers receive an unresisted motion from the actuator, any of said members being held in the path of the knock-0E lever when the corresponding vibrator and controller are held against normal movement, and knockoff mechanism having an operative movement when any of the members remain in the path of the knock-ofi" 1ever..

6. In a warp stop motion for looms, a plurality of vibrators having a normal oscillating movement, a controller for each vibrator, a regularly moving actuator supporting one end of each controller, yielding driving connections between each controller and the actuator, and knock-oil mechanisms having an operative movement when any of said vibrators is held against normal oscillating movement.

7. In a warp stop motion for looms, a plurality of normally oscillating vibrators, a reciprocating actuator, a plurality of contr-oller rods formed with eyes therein, levers operatively connected to the vibrators and passing through the eyes, yielding driving connections between the actuator and each controller, and knock-off mechanism having an operative movement when any vibrator is held against oscillation.

8. In a warp stop motion for looms, a plurality of normally oscillating vibrators, an actuator having a normal reciprocating movement, a plurality of controllers, one for each vibrator, one end of each controller being supported bythe actuator and having an eye formed therein, levers operatively connected to the vibrators and received by said eyes, yielding driving connections between the actuator and the controllers, and knock-- oil mechanism having an operative movement when any of said vibrators is held against normal oscillation.

In testimony whereof I have hereunto affixed my signature.

JOHN S. BELLOWS. 

